Detailed Weather Data for Project: MERE

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 12.22 9.00 58.00 127.00 03Mar2018 9 a.m. 15.00 15.00 50.00 323.00 03Mar2018 10 a.m. 18.89 15.00 40.00 512.00 03Mar2018 11 a.m. 22.22 10.00 29.00 653.00 03Mar2018 12 p.m. 25.56 11.00 20.00 737.00 03Mar2018 1 p.m. 26.67 10.00 14.00 764.00 03Mar2018 2 p.m. 27.22 14.00 15.00 727.00 03Mar2018 3 p.m. 27.78 14.00 13.00 626.00 03Mar2018 4 p.m. 27.22 15.00 10.00 478.00 03Mar2018 5 p.m. 23.89 19.00 35.00 287.00 03Mar2018 6 p.m. -901.00 -901.00 -901.00 -901.00 03Mar2018 7 p.m. 23.89 14.00 5.00 108.00 03Mar2018 8 p.m. 17.78 13.00 53.00 0.00 03Mar2018 9 p.m. 16.67 17.00 59.00 0.00 03Mar2018 10 p.m. 15.56 15.00 67.00 0.00 03Mar2018 11 p.m. 13.33 8.00 75.00 0.00 04Mar2018 12 a.m. 13.33 9.00 81.00 0.00 04Mar2018 1 a.m. 13.33 17.00 84.00 0.00 04Mar2018 2 a.m. 13.33 15.00 87.00 0.00 04Mar2018 3 a.m. 12.78 12.00 90.00 0.00 04Mar2018 4 a.m. 12.22 12.00 92.00 0.00 04Mar2018 5 a.m. 12.22 11.00 94.00 0.00 04Mar2018 6 a.m. 11.67 13.00 94.00 0.00 04Mar2018 7 a.m. 10.56 10.00 97.00 6.00 Accuml. Values 413.33 298.00 1262.00 5348.00 Num. Valid Values 23 23 23 23 Avg. Values 17.97 12.96 54.87 232.52 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -7.79 500.33 54.87 479.81 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4513 definition: xcompl = 1 - (RELH_avg/100) TdC = -15.3038 definition: TdC = TAIR_avg - ((14.55 + (0.114*TAIR_avg))*xcompl +pow((2.5 + 0.007*TAIR_avg)*xcompl, 3) + (15.9 +0.117*TAIR_avg)*pow(xcompl, 14)) del_lambda1 = 0.2873 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7127 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.3765 definition: Qn = 0.00714*SRAD_avg + 0.00000526*SRAD_avg*pow(TAIR_avg+17.8, 1.87) +0.00000394*pow(SRAD_avg, 2) - 0.00000000239*pow(SRAD_avg, 2)*pow(TAIR_avg-7.2, 2) - 1.02 es_ea = 1.5508 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.7527 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.115 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

Go to Tulsa District Water Control Home Page.